Which ancient civilization first implemented a standardized pricing system in their marketplaces using fixed price tags rather than the traditional haggling method?

Before modern shopping malls and e-commerce, ancient civilizations developed sophisticated retail systems that influenced commerce for millennia. From the agoras of Greece to the forums of Rome and the bazaars of Mesopotamia, retail innovation has deep historical roots. This trivia question explores how ancient civilizations revolutionized early retail concepts with pricing strategies that might surprise you!

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Ancient Romans, who created the 'pretium iustum' (just price) system in the Forum markets around 250 CE
Lydians of ancient Anatolia, who introduced fixed pricing alongside the world's first standardized coins around 600 BCE
Ancient Egyptians, who developed hieroglyphic price markers for goods in royal marketplaces during the New Kingdom period
Phoenician merchants, who established uniform pricing in their Mediterranean trading posts to simplify international commerce